Mods, please forgive me if I put this in the wrong section.
I think I've diagnosed this correctly, but I thought I'd ask in case I've missed something.
Someone has brought in what appears to be a hand built, non-commercial desktop PC. It has a Gigabyte GA-78LMT-S2P motherboard. The reason it was brought in is no internet access. It shows no connections with no connections available. I know the internet connection coming from the Ethernet cable is good. In the Ethernet port on the back of the motherboard it does not light up. Device manager, even when refreshed, does not show an Ethernet nor LAN device at all. SPECCY program does not find nor identify one. Just for grins I went to the motherboards website, downloaded and installed drivers...nothing.
I'm pretty sure it is a motherboard issue, though when Windows 7 boots it gives alerts about it possibly being a pirated copy of Windows...but it appears he has been using it for a while. He didn't tell me about that issue and I'm not able to get hold of him about it. I don't see how that is preventing the Ethernet/LAN port from functioning. I did check BIOS settings and all looked ok.
The USB ports on the back of the PC work, so I think the simplest and least expensive solution is a USB-Ethernet adapter. Once I get it on-line I can re-enter the product code key from the sticker to see if Windows activates.
Have I missed anything?